Updating repeating group by click of button

I have a list of cities and for each city I need to input daily temperature. So for each city I will have date and corresponding temperature. I will display the list of cities in a repeating group and for each city I will input the temperature for that day. Upon clicking the submit button, the date and temperature should be stored for each city.

Can someone help me with the data model for this problem and how to implement in bubble.

You should watch the video tutorials on storing data…they should solve the problem for you